Camera Shake Detection for Panning Exposure Control
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Solution Overview
Problem
Existing imaging apparatuses face challenges in accurately adjusting exposure time during panning photography, particularly when the main object has low contrast, making it difficult to calculate the desired flow blurring width and correct for image shake.
Innovation Solution
An imaging apparatus with a shake detection unit and a control unit that determines exposure time based on shake detection signals, using a motion vector detection system to separate object and background vectors and calculate panning shutter speed, ensuring precise adjustment of exposure time regardless of the presence of an angular velocity sensor in the interchangeable lens or camera body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If motion vector detection is used to calculate exposure time, then automation is improved, but measurement precision deteriorates when the main object has low contrast
Solution Approach 1:
The patent introduces a shake detection unit as an intermediary device that directly measures camera shake using acceleration sensors. This mediator provides reliable shake data even when motion vector detection fails due to low contrast, enabling accurate exposure time calculation without relying solely on image-based motion analysis.
Solution Approach 2:
The patent replaces the optical-based motion vector detection system with a mechanical/physical sensor system (acceleration sensors in the shake detection unit). This substitution uses physical measurement of camera shake rather than image processing, eliminating the limitation of low contrast objects affecting measurement precision.
2Illumination intensity
If panning photography is performed with decreased shutter speed, then dynamic feeling is improved, but camera shake and object shake increase
Solution Approach 1:
The patent implements a feedback control system where the shake detection unit continuously monitors camera shake and provides real-time data to the control unit. The control unit uses this feedback to automatically adjust exposure time, creating a closed-loop system that maintains stability while achieving the desired dynamic effect.
Solution Approach 2:
The patent dynamically changes the exposure time parameter based on detected camera shake conditions. By adjusting exposure time according to actual shake measurements rather than using fixed settings, the system optimizes the balance between dynamic feeling and shake control for each shooting situation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables precise automatic adjustment of exposure time during panning photography, maintaining a constant background flow level and effectively correcting for camera shake, even when the interchangeable lens does not have an angular velocity sensor, thereby improving image quality and user experience.
Implementation Method 1
a shake detection unit configured to be inside the camera body
Data Source
AI summary
An imaging apparatus is provided that includes a camera body on which a lens device is detachably mounted; a shake detection unit configured to be inside the camera body; and a control unit configured to determine an exposure time at a time of panning, wherein the control unit determines the exposure time at the time of panning based on a shake detection signal outputted by the shake detection unit.